[Qt-interest] QTreeWidget and checkable items

[Andreas Pakulat]

On 20.02.09 12:41:24, Lorenzo Berni wrote:
> I'm working on a QTreeWidget. The items of this QTreeWidget are  
> checkable and I want to be notified when one of them is checked (or  
> unchecked). In the documentation I can't find any signal for this  
> purpose so I decide to implement one using the itemPressed signal and  
> checking the state of the item passed by this. But when i click on an  
> item's checkbox the item passed by the signal has the previous state  
> instead of the current one, probably because the state is changed  
> after the signal is emitted. In fact clicking on the item (not on the  
> checkbox) the signal is emitted, and in this case the state is the  
> right one.
> 
> Anyone has an idea to resolve this problem?

- you probably want to use itemClicked(), that will be emitted when the
  click is complete (i.e. press+release have happened) and hence the state
  will be correct
- you could use the itemChanged() signal instead, which is fired when the
  data of the model changes (and changing the checkbox state is a data
  change)
- you could consider replacing the treewidget with a custom model +
  standard treeview and then have your checkableChanged() signal emitted
  directly from your setData() method

Andreas

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